Search Results

You are looking at 1 - 10 of 566 items for :

  • "enzyme activities" x
  • Refine by Access: All x
Clear All
Free access

Hui-Juan Zhou, Zheng-Wen Ye, and Ming-Shen Su

al., 2007 ). However, the effect of MAP on the content of flavor compounds and enzyme activities in flat peach during storage and shelf life has not been investigated much. Hence, no detailed information is available about how the contents of sugars

Free access

Michelle DaCosta and Bingru Huang

antioxidant enzyme activities, providing indirect evidence for the extent of generation of AOS and the importance of these enzymes in scavenging free radicals ( Smirnoff, 1993 ). Drought stress resistance has been associated with either maintenance or

Free access

Ramón A. Arancibia and Carl E. Motsenbocker

Red-mature Tabasco (Capsicum frutescens) fruit (`McIlhenny Select') normally separate easily at the junction of the fruit and receptacle or calyx. Differences in fruit detachment force (FDF) between two lines, one that separates readily (`McIlhenny Select') and one that does not (`Hard Pick'), have been reported previously (Motsenbocker et al., 1995). In this study, enzyme activity from the detachment area was analyzed by viscosity reduction. The reaction mixture was 0.3% pectin in 20 mm NaAc, pH 5.5, for polygalacturonase (PG) and 0.6% carboxymethyl cellulose (CMC) in 20 mm NaPO4, pH 6.0, for cellulase. Preliminary data indicated that PG and cellulase enzyme activity increased during fruit ripening in both lines. Only cellulase activity, however, correlated with FDF. In addition, the activity of both enzymes was higher in the `McIlhenny Select' line than the `Hard Pick' line at the orange and red-mature stages.

Free access

Lantian Du, Baojian Huang, Nanshan Du, Shirong Guo, Sheng Shu, and Jin Sun

(cv. Yusuan No. 1) to assess the effects of relay intercropping on cucumber plant growth, soil enzyme activities and microbial diversity, and biomass and community diversity. Materials and Methods Experimental materials and treatments. The experiments

Full access

Guangxin Liu, Xiaoqian Su, Lingling Guan, and Fengrong Hu

these harmful products, some enzymes function to clear free radicals and reactive oxygen. When plants are infected by pathogens, some enzyme activities are enhanced and others are reduced. These changes in enzyme activity affect various physiological and

Free access

Xiangdong Huang, Dong Xue, and Lian Xue

as integral components of soil quality. Microbial biomass C (C mic ), basal respiration (R mic ), and enzyme activities have been widely used in soil investigations as a result of their great sensitivity to anthropogenic disturbance and environmental

Free access

Lixin Xu, Liebao Han, and Bingru Huang

damage ( Sharma and Dubey, 2005 ; Turkan et al., 2005 ). However, alterations in antioxidant enzyme activities under drought stress are dependent on plant species, cultivar, and stress intensity and duration ( DaCosta and Huang, 2007 ; Rensburg and

Free access

Lucia E. Villavicencio, Sylvia M. Blankenship, G. Craig Yencho, Judith F. Thomas, and C. David Raper

radial walls of the phellogen, determined by their lability and proneness to fracture, that determines the resistance to skinning ( Lulai, 2002 ). There is no information on how cell wall enzyme activity varies in sweetpotato. Pectinases are

Free access

Carl E. Motsenbocker and Ramon A. Arancibia

Two tabasco pepper (Capsicum frutescens L.) lines were previously identified that differ in fruit detachment characteristics. Ethephon treatment (1000 μl/L) to intact tabasco fruit 29 days after anthesis (green-mature) enhanced ripening as indicated by fruit coloration in both lines. `McIlhenny Select' fruit, which normally separate readily at the red-mature stage, however, had a quicker ripening response compared to `Hard Pick' fruit. Ethephon increased cellulase activity in the fruit tissue of both tabasco lines compared to the untreated control, and there was a trend of higher cellulase activity in `McIlhenny Select' compared to `Hard Pick'. Differences in ripening and enzyme activity in response to ethylene generators indicate that the two tabasco lines are suitable material to investigate the physiological processes involved in pepper fruit ripening.

Free access

Huiying Li, Hongji Luo, Deying Li, Tao Hu, and Jinmin Fu

, respectively ( Table 4 ). Table 4. Antioxidant enzyme activities of perennial ryegrass subjected to 0.5 and 3.2 m m Pb in a hydroponic system using half-strength Hoagland's solution for 7 d. Gene expression of antioxidant enzymes. The expressions of MnSOD